Toán Lớp 7: giúp mik nha 15 phút thôi
a) 7x=15y, x-y = 32
B)x/2=y/3, y/6 = z/4, x -2y +z =8
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Toán Lớp 7: giúp mik nha 15 phút thôi
a) 7x=15y, x-y = 32
B)x/2=y/3, y/6 = z/4, x -2y +z =8
Comments ( 1 )
224+7y=15y suy ra -15y+7y=-224 suy ra -8y=-224 suy ra y=28
ta có y=28 nên x=32+y sẽ là: x=32+28=60